Only create a release if there's a tag

.github/workflows/release_generator.yml

@@ -121,6 +121,7 @@ jobs:
   generate-release:
     runs-on: ubuntu-latest
     needs: [create-linux-binary, create-windows-binary, create-macos-binary]
+    if: startsWith(github.ref, 'refs/tags/')
     steps:
     - name: Get Artifacts
       uses: actions/download-artifact@v4